Re: truth of %nil

[Neil Jerram]

Mark H Weaver <address@hidden> writes:

> On Sun, Aug 30, 2009 at 12:13:59PM +0100, Neil Jerram wrote:
>> Mark H Weaver <address@hidden> writes:
>> 
>> > This numbering has the nice properties that 0 is #f.
>> 
>> Just to be clear: will this mean that (SCM_BOOL_F == 0) ?  As things
>> stand I don't think it will, because SCM_MAKIFLAG shifts and adds
>> 0x04.
>
> Yes, that's correct.  SCM_BOOL_F is 4.  What I should have said above
> is that #f is IFLAG number 0.

Thanks for clarifying that.  (And from other threads it seems clear
now that SCM_BOOL_F == 0 would actually be a problem!)

     Neil